Mogens Weinrich (13 November 2000). "The history of a pathway" (in Danish). Jyllands-Posten. Archived from the original on 19 August 2014. Retrieved 18 August 2014.
"Åby Renseanlæg skal lave supergødning" [Åby treatment plant to make superfertilizer] (in Danish). Århus Stiftstidende. 3 June 2013. Retrieved 10 June 2018.
Mogens Weinrich (13 November 2000). "The history of a pathway" (in Danish). Jyllands-Posten. Archived from the original on 19 August 2014. Retrieved 18 August 2014.